LibriumArcana.Games

As of yesterday, Firefox (and utorrent) refuse to work (or even start up). I can't even reinstall Firefox the usual way-it claims I have no internet Connection. Thing is I DO-Internet Explorer works just fine (since I'm obviously able to post this). Utorrent claimed it couldn't find dnsapi.dll if that's any help.
Windows Security Essentials couldn't fix the problem, neither could Spybot. A forced Firefox reinstall didn't do bupkis (other than upping the Version number on my Firefox entry in 'Programs'.)
Anybody got any ideas?

Update: While Chrome starts. the only way to get on any Websites is via the IP address. Drakensang Online also won't fire up. STO also won't connect.
Setup stubs say I have no Internet Connection.
Update 2:Well, it seems to be definite-new DLL brought a change in behaviour-Firefox and utorrent Launch once again, so it Looks like it 'is' the dll. Anybody know where to find this stuff on Mirrsoft's home page? Cause working it still ain't so I likely got a wrong Version.

'sfc /scannow' seems to have fixed the problem. Now to get rid of the adware...